Sound-box.



PATENTED APR. 16. 1907.

E. D. GLEASON.

SOUND BOX. APPLICATION FILED FEB.8,1907.

I N VE N TOR ZZaaardJWedav/z.

ATTORNEY UNITE srn'rns PATENT OFFICE.

(EDWARD D. GLEASON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR T I vioron TALKING MACHINE COMPANY, A CORPORATION OF NEW JERSEY.

SOUND-BOX- $pecification of Letters Patent.

Patented April 16, 1907.

v Original application filed. July '26, 1902 ,Serlal No. 117,134. Divided and this application filed February 8, 1907. Serial No. 356,319.

-and complete disclosure, this application being a division of my application for patent filed July 26, 1902, Serial No. 117,134.

My invention relates to sound-boxes, more particularly to that class of the same in Whichthe stylus is tensioned on its bearings,

The object of my invention is to provide the stylus-lever with anelastic connection or mounting whereby a certain amount of tension will always be imparted .to the dia 'phragm, and better results in reproduction will be attained than when such elastic connection or mounting is not provided.

- In the accompanying drawings, Figure 1 is a front view of my sound-box, and Fig. 2 is a sectionalview ofthe same.

The sound-box has a tubular stem 1 with an enlarged or cup-shaped end 2, containing the diaphragm 3, the latter being mounted in this portion of the soundbox in any available manner. Seatedin the cup-shaped por. tion 2 is an internal annular elastic ring 4, which forms a circumferential bearing for the diaphragm 3. The stylus-lever 5 projects through an opening on one side of the cup shaped portion 2 of the sound-box casing and is provided with a detachable stylus 6. Projecting from opposite sides of said stylus-lever and bearing against a flattened portion on the outside of the case are trunnions 7 7.

The said trunnions form an antifriction bearing or fulcrum upon. which the stylus-lever can oscillate under action of the undulatory groove of the sound-record upon the stylus 6. A spring 8 is connected with the inner end of the stylus-lever and to that portion of the diaphragm-casing Opposite the portion through which the-stylus-lever projects. At'

the connection between the diaphragm-casing and the spring is a threaded rod 9, en gaged' by a nut 10, the latter bearing upon the outer end of the tubular stud or the boss 11 on the diaphragm-casing, so as to provide for imparting any desired degree of tensionto the spring 8 and likewise to the bearing upon which the stylus-bar oscillates.

Having now described my invention, what cillation thereo ent is-- 1. In a reproducer, a iulcrumed stylus-bar, a spring engaging said bar for exertingpressure to tension the bearing of said bar, said spring also engaging stationary means on the reproducer to one and the same side oi the I desire to claim and protect by Letters Patbearing as the engagement between said spring and bar, the points of engagement between the spring and said bar, between said spring and said stationary means, and the fulcrum-point, being substantially in longitudinal alinement.

2. In a reproducer, a stylus bar fulcrume on an :intifriction-bearing, and a spring engaging said bar for exerting pressure to tension said bearing in a plane of the axis of ossaid spring also engaging stationary means on another part of reproducer to one and the same side of said bear ing as the'engagement between said spring and bar.

3'. In a sound recording and reproducing machine, the combination with a sound-box casing of a diaphragm, a stylus-bar having a transverse bearing, and an elastic and adjust/able suspension engaging said stylus-bar bearing in position.

in the rear only of laid bearing, to hold said 4. In a sound reording and reproducing machine, the combination with a sound-box casing of a stylus-bar having bearing, a suspensi'on engaging bar in the rear only of said bearing, to hold thelatter' in position, and means adjustably securing said suspension.

5. In a sound recording and-reprodn-zing machine the combination with a sound-box. casing oi a diaphragm, a stylus-bar mounted on an axial bearing in such a'manner as to hold the said bar in contact with the sound box and against longitudinal. movement in a transverse said stylus-.

one direction, a suspension attached to said stylus-bar and passing diametrically through the sound-box to the opposite side thereof, the said suspension exerting. aipressure' to hold said bearing under tension against the sound-box casing, and means for adjustably securing said suspension in position.

6. In a sound recording and reproducing machine, the combination with a sound-box casing of'a diaphragm,a stylus-bar having an axial bearing on the sound-box casing to hold the stylus-bar against longitudin'l movement in one direction, a suspension-Wire attached to said bar',.the said wire exerting a pressure to 'hold -saidbearing under tension against the sound-box casing, and an adjusting-nut for securing the Wire atth'e opposite side of said sound-box.

7. In a sound reoording'and reproducing machine, the combination with a sound-box casing of a diaphragm, a stylus-bar having movement in onedirection, a suspensionl stages;

Wire attached to the said stylus-bar, said Wire tensioning said bearing against said casing, and means at the opposite side of the 1 5 casing for. adjustably supporting said wire.

In testimony whereof I have hereunto set my hand this 7th day of February, A. D. 1907. I i

EDWARi) '1). GLEAS'ON. Witnesses i 1 .HARRY COBB KENNEDY,

ALEXANDER PARK. 

